How antidepressants work
It’s not known exactly how antidepressants work.
It’s thought they work by increasing levels of chemicals in the brain called neurotransmitters. Certain neurotransmitters, such as serotonin and noradrenaline, are linked to mood and emotion.
Neurotransmitters may also affect pain signals sent by nerves, which may explain why some antidepressants can help relieve long-term pain.
While antidepressants can treat the symptoms of depression, they do not always address its causes. This is why they’re usually used in combination with therapy to treat more severe depression or other mental health conditions.